1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000-2009 Josh Coalson
3 * Copyright (C) 2011-2016 Xiph.Org Foundation
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #ifdef HAVE_CONFIG_H
34 # include <config.h>
35 #endif
36
37 #include <stdio.h>
38 #include <string.h> /* for strlen() */
39 #include "private/stream_encoder_framing.h"
40 #include "private/crc.h"
41 #include "FLAC/assert.h"
42 #include "share/compat.h"
43
44 static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method);
45 static FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const uint32_t residual_samples, const uint32_t predictor_order, const uint32_t rice_parameters[], const uint32_t raw_bits[], const uint32_t partition_order, const FLAC__bool is_extended);
46
FLAC__add_metadata_block(const FLAC__StreamMetadata * metadata,FLAC__BitWriter * bw)47 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw)
48 {
49 uint32_t i, j;
50 const uint32_t vendor_string_length = (uint32_t)strlen(FLAC__VENDOR_STRING);
51
52 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
53 return false;
54
55 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
56 return false;
57
58 /*
59 * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
60 */
61 i = metadata->length;
62 if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
63 FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
64 i -= metadata->data.vorbis_comment.vendor_string.length;
65 i += vendor_string_length;
66 }
67 FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
68 /* double protection */
69 if(i >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
70 return false;
71 if(!FLAC__bitwriter_write_raw_uint32(bw, i, FLAC__STREAM_METADATA_LENGTH_LEN))
72 return false;
73
74 switch(metadata->type) {
75 case FLAC__METADATA_TYPE_STREAMINFO:
76 FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
77 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
78 return false;
79 FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
80 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
81 return false;
82 FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
83 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
84 return false;
85 FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
86 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
87 return false;
88 FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
89 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
90 return false;
91 FLAC__ASSERT(metadata->data.stream_info.channels > 0);
92 FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
93 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
94 return false;
95 FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
96 FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
97 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
98 return false;
99 FLAC__ASSERT(metadata->data.stream_info.total_samples < (FLAC__U64L(1) << FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN));
100 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
101 return false;
102 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16))
103 return false;
104 break;
105 case FLAC__METADATA_TYPE_PADDING:
106 if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8))
107 return false;
108 break;
109 case FLAC__METADATA_TYPE_APPLICATION:
110 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
111 return false;
112 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
113 return false;
114 break;
115 case FLAC__METADATA_TYPE_SEEKTABLE:
116 for(i = 0; i < metadata->data.seek_table.num_points; i++) {
117 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
118 return false;
119 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
120 return false;
121 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
122 return false;
123 }
124 break;
125 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
126 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length))
127 return false;
128 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
129 return false;
130 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments))
131 return false;
132 for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
133 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length))
134 return false;
135 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
136 return false;
137 }
138 break;
139 case FLAC__METADATA_TYPE_CUESHEET:
140 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
141 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.cue_sheet.media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8))
142 return false;
143 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
144 return false;
145 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
146 return false;
147 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
148 return false;
149 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
150 return false;
151 for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
152 const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;
153
154 if(!FLAC__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
155 return false;
156 if(!FLAC__bitwriter_write_raw_uint32(bw, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
157 return false;
158 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
159 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
160 return false;
161 if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
162 return false;
163 if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
164 return false;
165 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
166 return false;
167 if(!FLAC__bitwriter_write_raw_uint32(bw, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
168 return false;
169 for(j = 0; j < track->num_indices; j++) {
170 const FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
171
172 if(!FLAC__bitwriter_write_raw_uint64(bw, indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
173 return false;
174 if(!FLAC__bitwriter_write_raw_uint32(bw, indx->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
175 return false;
176 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
177 return false;
178 }
179 }
180 break;
181 case FLAC__METADATA_TYPE_PICTURE:
182 {
183 size_t len;
184 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
185 return false;
186 len = strlen(metadata->data.picture.mime_type);
187 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
188 return false;
189 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len))
190 return false;
191 len = strlen((const char *)metadata->data.picture.description);
192 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
193 return false;
194 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len))
195 return false;
196 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
197 return false;
198 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
199 return false;
200 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
201 return false;
202 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
203 return false;
204 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
205 return false;
206 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length))
207 return false;
208 }
209 break;
210 default:
211 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length))
212 return false;
213 break;
214 }
215
216 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
217 return true;
218 }
219
FLAC__frame_add_header(const FLAC__FrameHeader * header,FLAC__BitWriter * bw)220 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw)
221 {
222 uint32_t u, blocksize_hint, sample_rate_hint;
223 FLAC__byte crc;
224
225 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
226
227 if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
228 return false;
229
230 if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
231 return false;
232
233 if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN))
234 return false;
235
236 FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
237 /* when this assertion holds true, any legal blocksize can be expressed in the frame header */
238 FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u);
239 blocksize_hint = 0;
240 switch(header->blocksize) {
241 case 192: u = 1; break;
242 case 576: u = 2; break;
243 case 1152: u = 3; break;
244 case 2304: u = 4; break;
245 case 4608: u = 5; break;
246 case 256: u = 8; break;
247 case 512: u = 9; break;
248 case 1024: u = 10; break;
249 case 2048: u = 11; break;
250 case 4096: u = 12; break;
251 case 8192: u = 13; break;
252 case 16384: u = 14; break;
253 case 32768: u = 15; break;
254 default:
255 if(header->blocksize <= 0x100)
256 blocksize_hint = u = 6;
257 else
258 blocksize_hint = u = 7;
259 break;
260 }
261 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
262 return false;
263
264 FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
265 sample_rate_hint = 0;
266 switch(header->sample_rate) {
267 case 88200: u = 1; break;
268 case 176400: u = 2; break;
269 case 192000: u = 3; break;
270 case 8000: u = 4; break;
271 case 16000: u = 5; break;
272 case 22050: u = 6; break;
273 case 24000: u = 7; break;
274 case 32000: u = 8; break;
275 case 44100: u = 9; break;
276 case 48000: u = 10; break;
277 case 96000: u = 11; break;
278 default:
279 if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0)
280 sample_rate_hint = u = 12;
281 else if(header->sample_rate % 10 == 0)
282 sample_rate_hint = u = 14;
283 else if(header->sample_rate <= 0xffff)
284 sample_rate_hint = u = 13;
285 else
286 u = 0;
287 break;
288 }
289 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
290 return false;
291
292 FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
293 switch(header->channel_assignment) {
294 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
295 u = header->channels - 1;
296 break;
297 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
298 FLAC__ASSERT(header->channels == 2);
299 u = 8;
300 break;
301 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
302 FLAC__ASSERT(header->channels == 2);
303 u = 9;
304 break;
305 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
306 FLAC__ASSERT(header->channels == 2);
307 u = 10;
308 break;
309 default:
310 FLAC__ASSERT(0);
311 }
312 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
313 return false;
314
315 FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
316 switch(header->bits_per_sample) {
317 case 8 : u = 1; break;
318 case 12: u = 2; break;
319 case 16: u = 4; break;
320 case 20: u = 5; break;
321 case 24: u = 6; break;
322 default: u = 0; break;
323 }
324 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
325 return false;
326
327 if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
328 return false;
329
330 if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
331 if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number))
332 return false;
333 }
334 else {
335 if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number))
336 return false;
337 }
338
339 if(blocksize_hint)
340 if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16))
341 return false;
342
343 switch(sample_rate_hint) {
344 case 12:
345 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8))
346 return false;
347 break;
348 case 13:
349 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16))
350 return false;
351 break;
352 case 14:
353 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16))
354 return false;
355 break;
356 }
357
358 /* write the CRC */
359 if(!FLAC__bitwriter_get_write_crc8(bw, &crc))
360 return false;
361 if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN))
362 return false;
363
364 return true;
365 }
366
FLAC__subframe_add_constant(const FLAC__Subframe_Constant * subframe,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)367 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
368 {
369 FLAC__bool ok;
370
371 ok =
372 FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN) &&
373 (wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) &&
374 FLAC__bitwriter_write_raw_int32(bw, subframe->value, subframe_bps)
375 ;
376
377 return ok;
378 }
379
FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed * subframe,uint32_t residual_samples,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)380 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, uint32_t residual_samples, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
381 {
382 uint32_t i;
383
384 if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK | (subframe->order<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
385 return false;
386 if(wasted_bits)
387 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
388 return false;
389
390 for(i = 0; i < subframe->order; i++)
391 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
392 return false;
393
394 if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
395 return false;
396 switch(subframe->entropy_coding_method.type) {
397 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
398 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
399 if(!add_residual_partitioned_rice_(
400 bw,
401 subframe->residual,
402 residual_samples,
403 subframe->order,
404 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
405 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
406 subframe->entropy_coding_method.data.partitioned_rice.order,
407 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
408 ))
409 return false;
410 break;
411 default:
412 FLAC__ASSERT(0);
413 }
414
415 return true;
416 }
417
FLAC__subframe_add_lpc(const FLAC__Subframe_LPC * subframe,uint32_t residual_samples,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)418 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, uint32_t residual_samples, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
419 {
420 uint32_t i;
421
422 if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK | ((subframe->order-1)<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
423 return false;
424 if(wasted_bits)
425 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
426 return false;
427
428 for(i = 0; i < subframe->order; i++)
429 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
430 return false;
431
432 if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
433 return false;
434 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
435 return false;
436 for(i = 0; i < subframe->order; i++)
437 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
438 return false;
439
440 if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
441 return false;
442 switch(subframe->entropy_coding_method.type) {
443 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
444 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
445 if(!add_residual_partitioned_rice_(
446 bw,
447 subframe->residual,
448 residual_samples,
449 subframe->order,
450 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
451 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
452 subframe->entropy_coding_method.data.partitioned_rice.order,
453 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
454 ))
455 return false;
456 break;
457 default:
458 FLAC__ASSERT(0);
459 }
460
461 return true;
462 }
463
FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim * subframe,uint32_t samples,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)464 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, uint32_t samples, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
465 {
466 uint32_t i;
467 const FLAC__int32 *signal = subframe->data;
468
469 if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
470 return false;
471 if(wasted_bits)
472 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
473 return false;
474
475 for(i = 0; i < samples; i++)
476 if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps))
477 return false;
478
479 return true;
480 }
481
add_entropy_coding_method_(FLAC__BitWriter * bw,const FLAC__EntropyCodingMethod * method)482 FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method)
483 {
484 if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
485 return false;
486 switch(method->type) {
487 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
488 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
489 if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
490 return false;
491 break;
492 default:
493 FLAC__ASSERT(0);
494 }
495 return true;
496 }
497
add_residual_partitioned_rice_(FLAC__BitWriter * bw,const FLAC__int32 residual[],const uint32_t residual_samples,const uint32_t predictor_order,const uint32_t rice_parameters[],const uint32_t raw_bits[],const uint32_t partition_order,const FLAC__bool is_extended)498 FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const uint32_t residual_samples, const uint32_t predictor_order, const uint32_t rice_parameters[], const uint32_t raw_bits[], const uint32_t partition_order, const FLAC__bool is_extended)
499 {
500 const uint32_t plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
501 const uint32_t pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
502
503 if(partition_order == 0) {
504 uint32_t i;
505
506 if(raw_bits[0] == 0) {
507 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen))
508 return false;
509 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0]))
510 return false;
511 }
512 else {
513 FLAC__ASSERT(rice_parameters[0] == 0);
514 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
515 return false;
516 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
517 return false;
518 for(i = 0; i < residual_samples; i++) {
519 if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0]))
520 return false;
521 }
522 }
523 return true;
524 }
525 else {
526 uint32_t i, j, k = 0, k_last = 0;
527 uint32_t partition_samples;
528 const uint32_t default_partition_samples = (residual_samples+predictor_order) >> partition_order;
529 for(i = 0; i < (1u<<partition_order); i++) {
530 partition_samples = default_partition_samples;
531 if(i == 0)
532 partition_samples -= predictor_order;
533 k += partition_samples;
534 if(raw_bits[i] == 0) {
535 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen))
536 return false;
537 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i]))
538 return false;
539 }
540 else {
541 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
542 return false;
543 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
544 return false;
545 for(j = k_last; j < k; j++) {
546 if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i]))
547 return false;
548 }
549 }
550 k_last = k;
551 }
552 return true;
553 }
554 }
555